Variable-transmission mechanism.



NO-'888,876- PATENTED MAY 26, 1908. 0. W. DAVIS.

VARIABLE TRANSMISSION MECHANISM.

APPLICATION FILED JULY 22, 1907.

2 SHEETS-SHEET 1.

11 mentor 9% 43M Attorneys No. 888,876. PATENTED MAY 26, 1908. 0.WIDAVIS.

VARIABLE TRANSMISSION MECHANISM.

APPLICATION FILED JULY 22, 1907.

2 SHEETS-SHEET 2.

1! iwentor Rttomeg's UNITED STATES PATENT OFFICE.

ORSON W. DAVIS, OF ROCHESTER, NEW YORK, ASSIGNOR TO GEARLESETRANSMISSION 00.,

' OF ROCHESTER, NEW YORK, A CORPORATION OF- NEW YORK.

Specification of Letters Patent.

Patented May 26, 1908.

Application filed July 22, 1907. Serial No. 385,014.

make and use the same, reference being had to the accompanying drawings,and to the figures of reference marked thereon, which form a part ofthis s ecification.

This inventlon re ates to var able speed transmission mechanismespeclally deslgned for use in connection with, the propulsion ofmotor-driven vehicles, and consists in the construction and arrangementof parts hereinafter fully set forth andpointed out particularly in theclaims. p p

The object of the invention is to provide simple and eflicient means fortransmitting the power from the motorto the driven shaft in a manner toenable said shaft to be driven directly or indirectly throughatransmission mechanism which'enables the speed to be varied at pleasure.

The above object is attained by the structure illustrated in'theaccompanying drawin in which e 1 is a plan view,- partly in section, ofmy improved transmission mechanism. Fig. 2 is a side elevation thereof.Fig. 3 is a longitudinal section through the clutch, the slidable wheelon the motor shaft in which said clutch lies, and the slidable frictiondisk on the driven shaft adapted to actuate said clutch to'co'nnect saidshafts directly. Fig. v4 is an elevation of the clutch mechan ism.

Referring to the characters of reference, 1

desi nates a suitable frame in which the mac anism-is mounted. Journaledin the boxes 2 on op osite sides of said frame are the short sha ts 3movable longitudinally through said boxes, and carr ing upon their innerends, the friction wheels 4, having peripheries 5 of suitable frictionmaterial".

Crossing the frame 1 between the friction wheels 4 is the driven shaft6-which stands parallel with the vertical faces of said wheels and uponwhich is splined a friction disk 7 having a peripheral ring 8, ofsuitable friction material.

the ordinary The motor or engine. driven shaft 9 carries fly Wheel 10and is provided with the umversal joints 11 to afford facilit ofmovement. The inner end of said sha t 9 is embraced by a sleeve 12'which is splined thereon and which is 1111311111 supported in aournal-bearing'13 vof the frame. The inner end of said sleeve extendsthrou h said bear-- ing and has fixedt-hereon a whee 14 having afriction face 15. The sleeve 12 extends onto the end of shaft 6, wherebthe shafts 6 and 9 .are su ported in axial a inement although indepenently rotatable.

To bring the friction face 15 of the wheel 14 into contact with'theperipheries of the wheels 4, the sleeve 12 carrying the wheel 14, ismade to slide upon the shaft 9 by means of across bar 16, having acollar 17 which-embraces said" sleeve between the hub 18 of the disk 14and the bearing 13 of said sleeve, there being rollers or bearing-balls19 interposed between said hub and collar to afford a thrust bearing.

The cross bar 16 is actuated to slide the sleeve 12 longitudinally andcarry the frictionface of the wheel 14 against the periphcries of thewheels 4 by means of the rods 20 which are connected to the ends of saidbar, and to'thecrank arms 21 on the rock shaft 22. Fixed to saidrockshaft 22 is a lever 23 through the medium of which the shaft may berocked to swing the crank arms '21 anddraw upon the rods 20, therebysliding the cross bar 16 and the sleeve 12' upon which the wheel 14 ismounted. When said wheel limis b rppght into engagement with theperipheries of the wheels 4, it is necessary at the same time to movethe. wheels 4 inwardly so as to cause their inner faces 24 to engage theperiphery of the disk 7. This movement of the wheels 4 is accomplishedby means of a lower set of toggle levers/25, and an upper set of togglelevers 26, the outer ends of which are pivoted at 27 to the upper andlower sides of the bearing boxes 2 and the inner ends of which areivoted at 28 to the collars 29 which emrace the shafts 3 of the Wheels 4and bear against the hubs of said wheels, there being suitable thrustbearings between said hubs rangement, the movement'of the lever 23 whichslides the wheel 14 into engagement with the peripheries of the wheels4, also actuates said wheels 4 to carry them simultaneously into contactwith the eriphery of the disk 7, thereby driving the s aft 6 indirectlythrough the wheel 14, the-wheels ,4,

i and the disk 7.

By sliding the disk 7 across thefaces of the wheels 4, any desired speedmay be attained and by carrying said disk past the axis of the wheels 4,the shaft 6 may be driven in a reverse direction. The movement' of thedisk 7 is accomplished through the medium of a collar 34 which embracesthe hub of said disk. and lies in a channel therein, and towhich isattached an operating rod 35, which is in turn pivoted to a lever 36which is connected to an arm 38 on the rock shaft '39, adapted to beactuated by a hand lever 40, whereby through the movement of said lever,the disk 7 may be caused to slide longitudinally. u on the shaft 6 tovary the speed of said s aft or reverse the motion thereof.

Provision is made for driving'the shaft 6 directly from the engine shaft9 by means of an expansible rin or band clutch-41, shown more clearly incentral recess 42 in theface of the wheel 14,

and which at one of its ends is bolted to a disk 43 fixed to the-end ofthe shaft 6. Be-

tween the opposite ends of'the ring 41 is j ournaled a in 44 whichpasses through the disk 43, and carries upon its-outer end a spring arm45, which when raised, will expand the ring and cause it to engage theannular wall of the recess 42, thereby forming a clutch connectionbetween the shafts 6 and 9 which causesthem to rotate in unison. Theactuation of the spring arm 45 is accomlished by means of the projectingbeveled fiub 46 on the sliding disk17 which, when said disk movesforward, is caused to engage said spring arm and actuate it to expandthe clutch ring as before described. Mounted on the hub of the disk 43and engagin with one end,'a stud 47 extending from sai disk, is a springbar 48, which with its other end engages one end of the ring 41 andwhose tension is exerted to close said ring when the hub 46 of the disk7 is withdrawn from engagement with the arm 45, thereby disen aging theclutch.

t will be noted that in the rods 20 betweenthe toggle levers 25 and thecross bar 16, are turn-buckles 49 for the purpose of properly adjustingsaid rods with respect to.

the movement which it is desired to impart to said cross bar. It willalso be noted that there is a second turn-buckle 50 in said rodsbetweenthe cranks 21, to which their ends are attached and the togglelevers 25, for

the purpose of regulating thefthrow of said shaft, an

ig. 4, which lies within a levers. For a like provided with turnles 51whereby I. the throw of the toggle levers 26 may be regulated.

Having thus fully set forth my invention, what I claim as new and desireto secure by Letters Patent, is:

1. In a frictional transmission mechanism, the combination of the motorshaft, a friction wheel movable axially thereon and rotatable therewith,a driven shaft in aline ment with the motor shaft, a friction diskmovable thereon and rotatable. therewith, opposed friction wheels havingplane faces adapted to enga e the riphery of the friction disk on theriven s fi aft, means for moving the friction wheel on the motor shaftinto enga ement with the peripheries of the oppose friction wheels,means'for moving said '0 osed friction wheels into en a ement PP i g edriven means for slidin said disk across the faces'of saido posed weels.

'2. Ina frictional thecombination of the motor shaft, a friction Wheelthereon mounted to slide longitudinally and to rotate therewith, adriven shaft in axial alinement with the motor shaft, a clutchforconnecting said shafts 'directl opposed friction wheels mounted tosli e in adirection at right angles to the axis of the driven shaft, afriction, disk mountedto slide upon the driven shaft and rotatabletherewith, means for carrying the opposed friction wheels into contactwith the periphwith the periphery of the disk' on t cry of said frictiondisk, means for carrying the friction wheel on the motor shaft intocontact with the peripheries of said 0 osed friction wheels, means forsliding sai disk across the faces ofsaid wheels, and for operating saidclutch.

3. In a frictional transmission mechanism, the combination of the motorshaft, a friction wheelrot'atable therewith and slidablethereon, adriven shaft, a friction disk slidable on the driven shaft and rotatabletherewith, opposed friction wheels movable into engagement'with theperiphery of said friction disk, and means for moving the friction wheelon the motor shaft into enga ement with theperipheries of the opposefriction wheels when engaging with t eir faces the periphery of theslidable friction disk. v

4. In a frictional transmission mechanism, the combination of the motorshaft, a friction wheel rotatable therewith and slidable thereon, 'adrivenshaft, a friction disk Ysplined u on the driven shaft, opposedfriction w eels movable into enga ement with the periphery ofthefriction dis and means for simultaneously carrying the opposedfriction wheels' into engagement with said disk and the friction wheelon the motor shaft into engagement with the peripheries of said opposedfrictionwheels.

urpiose the rods 32 are no transmission mechanism, a

In a fijietional transmission mechanism, the combination With the motorshaft, of the fi'iction 'wheel rotatable therewith and' slid- 1 ablethereon, a driven shaft, a friction disk 5 splined to the firiyenshaft,opposed friction Wheels movab to engagement with the eriphery ofsaidiction disk, toggle levers or moving said o'posed friction ,Wheels,

7 means for sliding tlie wheel on the motor 10 shaftinto engagement withthe periphery of connected with said toggle levers, and means foractuating said toggle levers.

' In witness whereof,- I sign this specification I in'the presence oftwo. witnesses.

QRSON DAVIS. Witnesses: I i

O. B. BAENZIGER, I. G.-H0WL ETT.

